Diagnostics for Periodically Excited Actuators

Stability Analysis in Parametrically Excited Electrostatic Torsional Micro-actuators

This paper addresses the static and dynamic stabilities of a parametrically excited torsional micro-actuator. The system is composed of a rectangular micro-mirror symmetrically suspended between two electrodes and acted upon by a steady (dc ) while simultaneously superimposed to an (ac ) voltage. First, the stability of the system subjected to a quasi-statically applied (dc ) voltage is investi...

The Periodically Driven excited Hydrogen Atom

This article describes the e ects of relatively strong, periodic perturbations on the classical and quantum dynamics of excited hydrogen atoms and the relation between these two dynamics. By considering a range of driving frequencies it is shown how the relative ratio of this to the unperturbed atomic frequencies a ects the response and the relation between the classical and quantum dynamics. A...

ARMAX Modal Parameter Identification for Structures Excited with Piezoceramic Actuators

Experimental methods used to determine the dynamic behaviour of helicopter structures can be broadly categorised as either ground testing methods or in-flight testing methods. A major limitation of ground testing is that dynamic properties determined from a grounded helicopter structure are usually significantly influenced by the boundary conditions. Therefore, it is desirable to carry out test...

Diagnostics Development for E-beam-excited Air Channels

Strange Nonchaotic attractors from periodically excited Chua's Circuit

Strange nonchaotic attractor refers to an attractor which is geometrically strange (fractal) but nonchaotic (i.e. typical orbits have nonpositive Lyapunov exponents). Since the pioneering work of Grebogi et al. [1984], much research has been carried out to show the existence, characterization and mechanisms for the creation of attractors in quasiperiodically excited systems [Romeiras & Ott, 198...